Model revisions
Revision C to revision D
Lines with quantity changes14
Lines added3
Lines removed1
Net effect at current rates+£38,400.00
Model revisions
A revised model arrives and the quantities have moved. QScope shows what changed between one issue and the next - lines that grew, lines that shrank, lines that appeared and lines that vanished - against the bill the job runs on.
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The net effect is priced at the rates already in the bill, so the first conversation about the revision starts from a figure.
The comparison
Reading two schedules side by side is how changes get missed.
The net effect is priced at the rates already in the bill, so the first conversation about the revision starts from a figure.
Into change control
Design development and a real change look identical in a schedule; the difference is whether anybody raises it.
Each raised variation carries the revision it came from, so the account and the model tell the same story.
The record
Six months later the question is never what the model says; it is what it said at the time.
The history is the defence. When a quantity is challenged, the issue it changed in - and what was done about it - is already written down.
Who it is for
You are applying
You price the change and defend itYou price the instruction, submit the variation and defend it when it comes back cut. Instructed work with no variation against it is money you have already spent.
Applying for paymentYou are certifying
You value the change and answer for itYou value the variation from the other chair and account for what you cut. The register you keep is the one the final account will be argued from.
Certifying paymentYou are doing both
You build the change, paid or notYou absorb the small changes as they come, and the ones nobody wrote down are the ones you end up building for free.
Doing both yourselfYou are reporting
You fund the change, priced or blindYou check that scope changes are priced and approved before money moves, because an unpriced variation is risk the facility is carrying blind.
Recommending a drawdownThe client, the architect and the tenderer are not on this list. They are the people you let in on a link: they see the one document you sent them, answer it, and that answer is written into the record. No account, no licence, no charge, on every plan.
The questions this page raises most often, answered without a sales pitch at the end.
No. The comparison works on the quantity schedules two issues produce. If your consultant issues revised quantities, that is enough.
No, and it must not. Differences become variation records only when you raise them, and nothing is revalued until a variation is approved. The model proposes; the contract disposes.
At the rates already in the bill, line by line. It is a starting figure for the conversation, not a claim by itself.
You note it as such, and the note stays on the record. The point is that every difference gets a decision, not that every difference gets a price.
From the blog
Three pieces from the same corner of a contract as this page, answered at length and without a sales pitch at the end.
Instruction first, then the valuation ladder your contract sets: contract rates, adjusted rates, a fair price or dayworks. Where each rung applies, and why the smallest variations are the ones that never get paid.
Read nowNo single extra under two hundred pounds feels worth the awkward conversation, and thirty of them are a month’s wages. The three-sentence habit that captures small changes without souring the job, and the quote clause that makes the habit expected.
Read nowTime and money are separate entitlements with separate tests. Why an extension of time does not carry money with it, what has to be ascertained, and where these claims usually fail.
Read nowKeep reading
Load both, read the differences as a list instead of two schedules side by side, and raise the ones that are real changes before the account is agreed.
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